Note 6 - Stock-Based Compensation - Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Jul. 02, 2016 USD ($) $ / shares shares
Minimum [Member]
Outstanding at October 3, 2015 (in dollars per share)	$ 7.55
Granted (in dollars per share)	23.95
Exercised (in dollars per share)	7.55
Outstanding, ending balance (in dollars per share)	9.16
Maximum [Member]
Outstanding at October 3, 2015 (in dollars per share)	21.96
Granted (in dollars per share)	23.95
Exercised (in dollars per share)	21.96
Outstanding, ending balance (in dollars per share)	23.95
Weighted Average [Member]
Outstanding at October 3, 2015 (in dollars per share)	15.14
Granted (in dollars per share)	23.95
Exercised (in dollars per share)	13.68
Outstanding, ending balance (in dollars per share)	18.50
Vested and anticipated to vest (in dollars per share)	18.47
Exercisable (in dollars per share)	$ 15.19
Outstanding at October 3, 2015 (in shares) | shares	923
Granted (in shares) | shares	56
Exercised (in shares) | shares	(580)
Exercised | $	$ 7,429
Outstanding, ending balance (in shares) | shares	399
Outstanding, ending balance	7 years 248 days
Outstanding, ending balance | $	$ 4,082
Vested and anticipated to vest (in shares) | shares	392
Vested and anticipated to vest	7 years 244 days
Vested and anticipated to vest | $	$ 4,027
Exercisable (in shares) | shares	146
Exercisable	5 years 343 days
Exercisable | $	$ 1,983